Automatic flushing of interim nozzle on a cleaning machine

ABSTRACT

A portable cleaning assembly is provided. The cleaning assembly comprises a fluid dispensation path for ejecting at least a first and a second cleaning solution from the assembly. The dispensation path comprises at least one shared segment, and a second fluid or solution is preferably passed through the shared segment wherein the second fluid comprises a solvent and is operable to clean at least one of the shared segment and an ejection nozzle associated with the shared segment.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional application of U.S. Ser. No. 15/298,995 entitled “Automatic Flushing of Interim Nozzle on a Cleaning Machine,” filed on Oct. 20, 2016, the entire disclosure of which is incorporated herein by reference.

FIELD

The present disclosure generally relates to methods and systems for fluid and chemical dispensation. More specifically, the present disclosure relates to methods and systems for dispensing cleaning fluids and wherein cleaning devices are provided to dispense multiple fluids or chemicals in a specific manner to enable cleaning operations and to flush or purge a system or device in connection with those cleaning operations.

BACKGROUND

U.S. Pat. No. 5,833,364 to Rushing et al., which is hereby incorporated by reference in its entirety, discloses a chemical delivery and blending system. Rushing et al. provides a multi-channel chemical blending system with automated valves for blending chemicals and cleaning the system. Rushing et al. fails to provide various novel features, devices and the methods of the present disclosure, including features related to portable cleaning machines as shown and described herein.

U.S. Pat. No. 6,889,603 to Carhuff et al., which is hereby incorporated by reference in its entirety, provides a food or beverage dispenser with at least one source of rinsing, cleaning or sanitizing fluid for distribution through at least some of the flowpath(s) of the device. Carhuff et al., however, fails to disclose various features of the present disclosure including, for example, a floor or surface cleaning device and method of operating the same.

Known methods and devices for cleaning fluid lines and nozzles comprise providing a flow of water through the lines and/or nozzles after a cleaning operation is conducted. However, even where the water in such devices and methods is heated to increase solubility of cleaning agents and debris to be cleaned and enhance cleaning efficacy, debris and chemicals are known to build up within the devices and cause clogging and blockages within the various fluid flow lines, valves, orifices, and similar components of the device.

SUMMARY

Accordingly, there has been a long-felt and unmet need to provide a floor cleaning device comprising various features and methods of the present disclosure. Such features include, for example, the provision of a first and second working fluid, and wherein the second working fluid is operable to be employed as a cleaning or working fluid and wherein the second working fluid comprises a solvent (at least with respect to the first cleaning fluid). In preferred embodiments of the present disclosure, a method of operating a cleaning device is provided wherein at least one step of the method comprises providing a flow of the second fluid through a fluid conduit to remove a first fluid from the conduit and wherein the second fluid is ultimately used as a cleaning or working fluid.

It is an object of the present disclosure to provide a cleaning device comprising at least one fluid supply line and at least two fluid storage tanks. A first fluid storage tank is operable to store or house a first cleaning fluid. A second fluid storage tank is operable to house a second cleaning fluid. The first fluid storage tank and the second fluid storage are both in fluid communication with the at least one fluid supply line and are operable to convey fluid to and/or through the fluid supply line. The device comprises control means including, for example, at least one of a user-interface, a switch, and on-board logic to control a flow rate and a flow sequence of the fluids from the first and second fluid storage tanks. Preferably, a first fluid from a first fluid storage is conveyed through the fluid supply line and is used in a cleaning operation. Subsequent to this flow of first fluid, a volume of the second fluid from the second fluid storage tank is conveyed through the fluid supply line and is used in a second cleaning operation, wherein the second cleaning operation comprises at least a cleaning of the fluid supply line and, in certain embodiments, also comprises a cleaning of a surface or object external to the machine that is to be cleaned. In various embodiments, cleaning devices of the present disclosure comprise built in logic and control features, such that when a cleaning operation is initiated (e.g. through a manual user input), the cleaning operation proceeds through at least two fluid dispensation steps, wherein the first fluid dispensation comprises activating a first fluid flow through a fluid supply line and the second fluid dispensation comprises activating a second fluid flow through the fluid supply line. The automatic activation and flushing of the fluid supply line with the second fluid may be accomplished, for example, by the provision and use of an on-board control panel or circuit board and at least one solenoid valve to initiate and terminate fluid flow based on signals and commands from the control panel or circuit board.

In various embodiments, a second cleaning or working fluid of the present disclosure comprises a deep extraction cleaning fluid. In some preferred embodiments, a first fluid comprises an interim cleaning solution and a second fluid comprises a fluid that acts as a solvent at least with respect to the interim cleaning solution. Interim cleaning fluids suitable for use with embodiments of the present disclosure include, but are not limited to, encapsulation carpet cleaners such as CRYSTAL DRY™ sold commercially by WHITAKER™ Such a fluid is provided as an example only, and one of ordinary skill in the art will recognize various other similar or related cleaning fluids that may be used.

As used herein, the term “first” cleaning solution or cleaning fluid generally refers to a fluid or solution that is intended to be provided or directed through cleaning lines in a device as an initial process or step of a cleaning operation. Additionally, as used herein, the term “second” cleaning solution or cleaning fluid generally refers to a fluid that is intended to be directed or dispensed through the device as part of a second operation or method step and wherein the second fluid follows or flushes the first fluid. It will be recognized, however, that additional fluids may be provided with devices and systems of the present disclosure. Additionally, in various modes of operation, the provision or flow of a first fluid cleaning fluid and second cleaning fluid may be reversed.

In various embodiments, a device is provided comprising at least one fluid line or interim fluid line. The at least one fluid line is in fluid communication with a first fluid comprising an interim fluid. The at least one fluid line is also in fluid communication with a deep extraction cleaning fluid. The device is operable to selectively dispense or transmit the first fluid through the at least one fluid line. The device is further operable to selectively dispense or transmit a second fluid in the form of a deep extraction fluid, and wherein the deep extraction fluid is operable to clean the fluid line and prevent build-up of a first fluid and/or debris related thereto in the at least one fluid line.

In various embodiments, at least one fluid line is provided that comprises a chemical flow path. The chemical flow path is operable to transport an interim chemical solution from a storage area or reservoir to a surface to be cleaned. The chemical flow path is also operable to transmit a second, extraction-type cleaning solution from a storage area or reservoir to the surface to be cleaned. Accordingly, in preferred embodiments, cleaning devices of the present disclosure comprise a first reservoir and a second reservoir. The first reservoir and the second reservoir are both in selective fluid communication with the same chemical flow path or conduit. Known devices provide separate conduits or chemical flow paths for different cleaning fluids, and water is generally provided to separately clean each chemical flow path. Embodiments of the present disclosure avoid the need for the multitude of chemical flow paths typically provided in known devices, Embodiments of the present disclosure also simplify a cleaning operation of the device, by conveying a second chemical through the same line that is used to convey a first cleaning fluid.

In various embodiments, at least one cleaning fluid or chemical provided with a floor cleaning device comprises a cleaning solution that is both operable to clean a surface (e.g. carpet) and also comprises the characteristic of a solvent to clean internal conduits and chemical flow paths of the device.

The term “interim” as used herein, at least with respect to a fluid, solution or chemicals generally refers to interim cleanings and related solutions that do not comprise a “deep” cleaning solution. It is known to provide interim cleaning operations on carpeted areas of high traffic or frequent soiling, for example. Interim cleaning and related interim cleaning solutions generally provide a quick and easy cleaning that is more superficial than a deep extraction carpet cleaning. Such interim procedures, chemicals, and solutions generally serve to clean upper or outer layers of a carpet or ground surface, remove contaminations and dirt before such debris is allowed to penetrate the carpet or flooring, and generally prolong the life of the flooring surface and make deep-cleaning easier. Frequently, chemicals and solutions contemplated for use with interim cleaning operations comprise encapsulation solutions. Such fluids are operable to be applied as a liquid, and form a crystalized material upon drying. The crystalized product or residue provides an encapsulation vehicle to capture soil and debris, and such that the crystallized material and any encapsulated solids may be easily extracted through a vacuuming operation (for example).

As used herein, the terms “interim” and “encapsulation” cleaning solutions and chemicals are interchangeable. Encapsulation solutions comprise various commercially-available encapsulation cleaners including, for example, CERTIFIED CARPET CARE® encapsulation cleaning solutions.

The present disclosure contemplates that various different chemicals may be provided in and directed through a cleaning device or machine. A first solution and a second solution may comprise any number or types of solutions. However, in preferred embodiments, a first solution for provision through a cleaning device comprises an interim cleaning solution or an encapsulation cleaning solution and a second solution for provision through the cleaning device comprises an extraction or deep extraction solution.

The terms “extraction” or “deep extract” as used herein with respect to a fluid, solution or chemical generally refers to products that are operable to break down and extract debris and contaminants from a carpet. Extraction and deep extraction fluids, preferably used as “second” fluids in various embodiments described herein, preferably comprise solvents. Such solvents include, but are not limited to, PROCHEM™ Ultrapac Trafficlean, All Fiber Rinse and/or Slurry products.

In some preferred embodiments of the present disclosure, a chemical delivery system is provided with the ability to automatically clean or rinse the system. A first fluid or chemical, such as an interim crystallizing formula, is provided and the fluid is routed or dispensed through the system by means of a conduit, fluid line, tube, etc. Such interim fluids, while useful for encapsulating and removing dirt particles from a carpet (for example), can clog a delivery system conduit or fluid line as portions of the interim fluid(s) may dry within the fluid line. Embodiments of the present disclosure thus provide an extraction chemical or solution in fluid communication with the same delivery path as the interim cleaning fluid, such that when the extraction chemical is directed through the delivery path and dispensed, the delivery path is automatically cleaned by a standard or pre-set cleaning operation of the device.

In various embodiments, an electrical carpet extractor device is provided, wherein the device comprises a self-contained portable carpet extractor intended for commercial and residential use. The device is operable to dispense a cleaning solution onto a carpet or surface, agitate the wet surface and extract the soiled solution back into a recovery tank provided on the unit. In certain embodiments, the device further comprises a hand tool that may be selectively activated to pick-up spent fluids. In preferred embodiments, the device comprises at least one on-board storage tank for receiving solutions and chemicals. The device comprises at least one extraction nozzle for dispensing extraction solutions and at least one interim nozzle for dispensing an interim cleaning solution. On-board logic and structure is provided such that both an interim cleaning solution and an extraction cleaning solution can be routed through a shared length of a fluid delivery conduit and through the interim nozzle. The device may comprise first and second storage tanks for storing and dispensing interim and extraction solutions, respectively. Alternatively, the device may comprise a single solution tank which may be supplied with or filled with an interim cleaning solution and an extraction cleaning solution based on user preference and need.

In one embodiment, a floor treatment apparatus is provided and comprises a chassis, a cleaning assembly comprising a vacuum motor, and at least a portion of the cleaning assembly is provided on a lower portion of the apparatus and is operable to clean a floor surface. A fluid delivery system is provided that comprises a fluid delivery path, a first ejection nozzle and a second ejection nozzle. The device further comprises a first solution storage tank, and the fluid delivery path extends between and is provided in fluid communication with the first solution storage tank and at least one of the first ejection nozzle and the second ejection nozzle. A pump is provided that is operable to convey fluid from the storage tank through the fluid delivery path. A solenoid valve is provided in communication with the fluid delivery path, wherein the solenoid valve is operable to activate and terminate a fluid flow to the first ejection nozzle.

In another embodiment, a floor treatment apparatus is provided that comprises a chassis and a cleaning assembly. The cleaning assembly comprises a brush, a vacuum motor, and a pick-up orifice. At least a portion of the cleaning assembly is provided on a lower portion of the apparatus and is operable to clean a floor surface. A fluid delivery system comprises a solution storage tank and a fluid delivery path. A first ejection nozzle is provided that is operable to dispense a first cleaning solution. A second ejection nozzle is provided that is operable to dispense a second cleaning solution. The fluid delivery path comprises a first length wherein a single conduit is provided, and wherein a fluid from the solution storage tank is provided through the single conduit. The fluid delivery path further comprises a bifurcation separating the single conduit from the first ejection nozzle and the second ejection nozzle. A pump is provided that is operable to convey fluid from the storage tank through the fluid delivery path, and a valve is provided that is operable to control fluid flow to the first ejection nozzle and the second ejection nozzle.

In one embodiment, a method of operating a floor treatment apparatus is provided, the method comprising the steps of: providing a floor treatment apparatus comprising: a chassis; a brush, a vacuum motor, and a pick-up orifice, and wherein at least a portion of the cleaning assembly is provided on a lower portion of the apparatus and is operable to clean a floor surface; a fluid delivery system comprising a solution storage tank and a fluid delivery path; a first ejection nozzle operable to dispense a first cleaning solution; a second ejection nozzle operable to dispense a second cleaning solution; wherein the fluid delivery path comprises a first length comprising a shared length; a pump operable to convey fluid from the solution storage tank through the fluid delivery path; a valve operable to control fluid flow to the first ejection nozzle and the second ejection nozzle. The method further comprises the steps of directing a first fluid from the solution storage tank through the shared length of the fluid delivery path, and wherein the first fluid comprises an encapsulation cleaning solution; directing a second fluid from the second solution storage tank through the shared length of the fluid delivery path, and wherein the second fluid comprises a solvent; and wherein the second fluid is operable to remove the first fluid from the fluid delivery path.

The Summary is neither intended nor should it be construed as being representative of the full extent and scope of the present disclosure. The present disclosure is set forth in various levels of detail in the Summary as well as in the attached drawings and the Detailed Description and no limitation as to the scope of the present disclosure is intended by either the inclusion or non-inclusion of elements, components, etc. in this Summary. Additional aspects of the present disclosure will become more readily apparent from the Detailed Description, particularly when taken together with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosed system and together with the general description of the disclosure given above and the detailed description of the drawings given below, serve to explain the principles of the disclosed system(s) and device(s).

FIG. 1 is a schematic view of a cleaning system flow path according to one embodiment of the present disclosure.

FIG. 2 is a perspective view of a floor cleaning machine according to one embodiment of the present disclosure.

FIG. 3 is a perspective view of a floor cleaning machine according to one embodiment of the present disclosure.

FIG. 4 is a rear elevation view of the floor cleaning machine of the embodiment of FIG. 3

FIG. 5A is a side elevation view of the floor cleaning machine according to the embodiment of FIG. 3.

FIG. 5B is a front elevation view of the floor cleaning machine according to the embodiment of FIG. 3.

FIG. 5C is a side elevation view of the floor cleaning machine according to the embodiment of FIG. 3.

FIG. 6A is a side elevation view of a floor cleaning machine according to one embodiment of the present disclosure.

FIG. 6B is a side elevation view of the floor cleaning machine according to the embodiment of FIG. 6A.

FIG. 7 is a perspective view of a cleaning assembly according to one embodiment of the present disclosure.

It should be understood that the drawings are not necessarily to scale. In certain instances, details that are not necessary for an understanding of the disclosure or that render other details difficult to perceive may have been omitted. It should be understood, of course, that the disclosure is not necessarily limited to the particular embodiments illustrated herein.

DETAILED DESCRIPTION

FIG. 1 is a schematic view of a chemical delivery system 2 according to one embodiment of the present disclosure. As shown, the system 2 comprises a first solution tank 4 and a second solution tank 6. The first solution tank 4 and the second solution tank 6 are provided to house first and second cleaning fluids, respectively. Directional arrows 8 provided through the system in FIG. 1 illustrate a preferred fluid flow path through a delivery line 5 of the system 2. The system 2 of FIG. 1 comprises a solution plate 10. The solution plate 10 comprises a lid to the solution tank or tanks 4, 6. A fluid is passed through the solution plate 10 into the solution system. A strainer 12, a pump 13, and at least one solenoid valve 15 for controlling a fluid flow within the delivery line 5 are provided. The provision of, and the specific location of such elements, is provided to illustrate an exemplary embodiment of the present disclosure. It will be recognized that the invention(s) provided herewith are not limited to the specific arrangement of or provision of certain parts in FIG. 1. For example, the pump 13 may be provided at any one or more locations within the system 2. Additionally, the pump 13 may comprise various different types of pumps including, for example, peristaltic pumps, lobe pumps, centrifugal pumps, vane pumps, gear pumps, diaphragm pumps, and other pumps as will be recognized by one of ordinary skill in the art.

Although FIG. 1 depicts a device comprising a first solution tank 4 and a second solution tank 6, alternative embodiments of the present disclosure contemplate providing a single storage or solution tank. In such embodiments, a first solution is provided in and dispensed from the single solution tank until substantially all of the first solution is spent or emptied from the tank. Subsequently, a second fluid is supplied to the single solution tank, and a system flush is provided through the dispensation of the second fluid from the solution tank. It will also be recognized that more than two fluids may be supplied within a solution tank, regardless of the number of solution tanks that are provided within systems and devices of the present disclosure.

As shown in FIG. 1, the strainer 12 is provided in the delivery line and is adapted to filter and remove debris from a fluid in the delivery line 5. In various embodiments, the strainer 12 is selectively applied or inserted into the system, and it is contemplated that the system may run with or without the strainer 12. Also, the strainer may be placed at many various spots along the fluid lines.

The system 2 of FIG. 1 comprises a shared or common delivery line 5 for chemicals and solutions provided in both the first solution tank 4 and the second solution tank 6. In various embodiments, methods of operating the system are provided, as would be understood by skilled artisans. In some preferred embodiments, the method comprises dispensing a fluid from the first solution tank 4 through at least a portion of the delivery line 5. The dispensation of the fluid from the first solution tank 4 is terminated, and a second flow is provided, wherein the second flow comprises a flow of a second fluid or chemical from the second solution tank 6 through at least portions of the delivery line 5, where the first solution was provided or directed.

In various embodiments, a cleaning device is provided wherein a first and second fluid are provided in first and second solution storage tanks. In certain embodiments, the first and second fluids are directed through a common fluid delivery path and wherein the device is devoid of other fluid flow paths such that the fluids must each flow through said fluid delivery path. In alternative embodiments, at least one of a first and second fluid is in fluid communication with a plurality of fluid delivery paths, and wherein a user may select a desired path. In such embodiments, a user is provided with the ability to selectively direct a second fluid through the same delivery flow path that a first fluid was previously routed. The user is also provided with an ability to bypass the first delivery path and direct the second fluid to a separate conduit or delivery path when a “flushing” or sharing of a single flow path is not desired. The selection of a fluid delivery path by a user is preferably accomplished by a user input. The user input may comprise, for example, activation of a switch on a control panel, an electronic input, and various other input as will be recognized by one of ordinary skill in the art. Such embodiments may be desirable, for example, when a user wishes to have the option to “flush” a first delivery path with a second fluid, but also occasionally wishes to dispense the second fluid through a line or path that is dedicated to the second fluid and wherein no cross-contamination occurs during dispensation.

As shown in FIG. 1, a majority of the delivery line 5 comprises a shared delivery line. A portion of the system (indicated as 20 in FIG. 1) comprises a dedicated path for only a second fluid (e.g. an extraction fluid). As shown in FIG. 1, a first fluid is operable to travel through the delivery system and delivery line 5 and be dispensed through a first outlet 18. A second fluid is operable to be transmitted through the delivery line 5 and may be ejected through any one or more of first 18, second 14 and third outlets 16. In various embodiments, the outlets 14, 16, 18 comprise and/or are provided with nozzles for pressurized, directed ejection of the fluid. Flow of the fluids to the outlets 14, 16, 18 is preferably controlled by the solenoid valve 15. For example, during a cleaning operation wherein a first fluid is to be dispensed from the delivery line 5, a first solenoid valve 15 a is provided in a closed position and a second solenoid valve 15 b is provided in an open position and the fluid is thus directed out through the first outlet 18. To rinse or purge the first fluid from the delivery line 5, a second fluid (preferably comprising a solvent or solvency properties) is directed through the same path as the first fluid. In various embodiments, flow may be directed or redirected through the second and third outlets 14, 16 by altering the state or positions of the solenoid valves 15 a, 15 b. Additional solenoid valves 15 c, 15 d are provided proximal to the first and second 4, 6 solution tanks to selectively enable flow of a fluid from the tanks.

In preferred embodiments, the operation of the solenoid valves 15 shown in FIG. 1 is controlled through logic built into the system. In alternative embodiments, the flow of at least a first and a second fluid through the system 2 is controlled by direct inputs by a user (e.g. switches and prompts). Preferably, a cleaning operation is initiated and the flow of a first and second fluid is automatically controlled by timing mechanisms and signals to the solenoid valves 15 to provide the appropriate timing and flow rate(s) of a first fluid and a second fluid and wherein the second fluid is dispensed in a manner that is suitable to purge or clean the first fluid from at least a portion of the delivery line 5.

FIG. 2 is a perspective view of a floor cleaning machine comprising a fluid delivery path according to one embodiment of the present disclosure. Fluid delivery and dispensing systems of the present disclosure may be provided in combination with various different floor cleaning devices including, but not limited to, walk-behind device, ride-on devices, conventional non-commercial vacuum devices, professional cleaning devices, pressure-washers, and various other devices. For illustration purposes, FIG. 2 provides a ride-on floor cleaning device that is contemplated as comprising a fluid-delivery system as shown and described herein. It will be expressly recognized, however, that fluid-delivery systems of the present disclosure are not limited to being provided within the device of FIG. 2.

As shown in FIG. 2, the device 30 comprises a ride-on floor or surface cleaning device with a deck assembly 32. The deck assembly is provided beneath and/or extends from a chassis 34. The chassis 34 comprises a platform 36 that is adapted to receive a user/operator in a standing position. The device further comprises a control panel 38 that is accessible to a user. In addition to a deck assembly 32, the device may be provided with one or more scrubbing or burnishing pads 33. The system shown in FIG. 1, including a first solution tank (FIG. 1, item 4) and a second solution tank (FIG. 1, item 6) are preferably provided and contained within the chassis 34. The system 2 is operable to dispense fluids as shown and described herein, and wherein fluids are ultimately dispensed from the deck assembly 32, or from a nozzle or ejection point proximal to the deck assembly. Cleaning devices including rollers or scrubbers and/or vacuum devices provided on the deck assembly 32 are operable to interact with and pick-up or extract fluids dispensed from the system 2. The control panel 38 preferably comprises at least one control for activating fluid dispensation and/or selecting whether or not a “flushing” operation is desired. For example, a process of providing a first fluid to the deck assembly 32 and subsequently providing a second fluid through the same conduit(s) that transmitted the first fluid may be automatically activated or initiated by a user-input on the control panel 38. Preferably, the second fluid comprises a solvent and the fluid flow path(s) are automatically cleaned by the dispensation of the second fluid.

FIG. 3 is a perspective view of a floor cleaning device 42 according to one embodiment of the present disclosure. As shown, the floor cleaning device 42 comprises a body or chassis 44 provided on wheels 46 and at least one cleaning assembly 43. The device 42 of FIG. 3 generally comprises a walk-behind machine, and is devoid of a platform for receiving a user. The device 42 also comprises a steering column 48 for steering and controlling the device. One or more controls, including a rotary control switch 50 is provided on or proximal to the steering column 48. The rotary control switch 50 provides a user with the functionality to change operating modes of the devices and to select between different cleaning functions and modes. The device 42 of FIG. 3 is provided with a chemical delivery system as shown and described herein including, for example, chemical delivery and rinsing features as shown in FIG. 1. Specifically, the device 42 comprises at least one fluid delivery line to convey chemicals and fluids between an onboard storage tank or vessel and at least one nozzle or similar ejection point provided in the cleaning assembly 43. A fluid inlet 52 is provided that is generally accessible to user and which facilitates filling and replacing fluids within at least one storage tank provided within the device. The device 42 shown in FIG. 3 preferably comprises an electric device with a charge cord 54 extending therefrom. In various embodiments, the device 42 may run directly from current supplied by an external source, and/or comprises an on-board rechargeable battery for enhanced mobility.

As further shown in FIG. 3, the device 42 comprises a first spy glass 58 and a second spy glass 60. The spy glasses 58, 60 comprise visual indicia and inspection means for a vacuum flow path and a solution intake flow path, respectively. During machine operation, either or both of the spy glasses 58, 60 can be monitored to determine if, for example, water or foam is entering the vacuum system, which can damage the vacuum motor. Similarly, the solution intake spy glass 60 can be monitored to provide information related to the amount of contaminants provided in the solution and to determine whether or not solution replacement is needed.

As further shown in FIG. 3, the device 42 comprises a solution drain hose 62 and a recovery drain hose 64. Both drain hoses 62, 64 comprise drop-hoses that are adapted for selectively draining a fluid from a solution tank and a recovery tank, respectively.

FIG. 4 is a rear elevation view of the floor cleaning device 42 of the embodiment of FIG. 3. As shown in FIG. 4, the rotary control switch 50 is provided in a detailed view for illustration purposes. In the depicted embodiments, the rotary control switch 50 comprises a plurality of inputs or modes which may be selected by rotating the switch. The switch 50 is operable to convert the devices between various different modes of cleaning and/or operation. For example, the rotary control switch 50 is operable to convert the device between the following operations: brush-only (wherein a brush provided on the cleaning assembly 43 will activate without dispensation of fluids), encapsulation mode (wherein an encapsulation cleaner is dispensed from an interim jet and wherein the brush is activated), Eco! Mode Extraction (wherein the brush is activated and a solution is provided form jets at a reduced flow, and the vacuum motor runs at a reduced pressure and lower sound level), deep extraction (wherein an extraction solution is dispensed and the brush and vacuum motor are activated), vacuum-only (wherein the vacuum motor and the brush are activated, and an accessory tool operation (wherein the vacuum motor is activated and solution is supplied to an accessory port).

A main control or power switch 56 is provided on the steering column 48, which is operable to activate or provide power to the device and run whichever mode is selected by the rotary control switch 50. Although the control switch 50 is depicted as a rotary control switch in the embodiment provided in FIG. 4, it will be expressly recognized that the present disclosure is not limited to devices comprising a rotary control switch. Indeed, it is contemplated that various embodiments comprise similar features and settings as shown and described with respect to FIGS. 3-4, and wherein the switch 50 comprises a different configuration(s). Such a configuration includes, in various embodiments, a touchscreen control panel, a plurality of switches, and various other devices and user-inputs as will be recognized by one of ordinary skill in the art.

FIGS. 5A-5C are left side, front, and right side elevation views, respectively. As shown, a floor cleaning device 42 comprises a cleaning assembly 43. The cleaning assembly 43 comprises a brush 70 in the form of a roller brush and a debris tray 72 provided proximal to the brush and operable to receive debris and contents displaced by the brush 70. A vacuum shoe 74 is provided, and the vacuum shoe 74 generally comprises a trailing feature with respect to the brush 70 and debris tray 72. A solution strainer 75 is provided to strain and filter solutions and chemicals prior to dispensation through the cleaning assembly 43.

As shown in FIG. 5B, the device 42 comprises a plurality of extraction jets 76, and at least one interim nozzle or jet 78. As shown and described herein, the extraction jets 76 are in fluid communication with a fluid line for supplying an extraction chemical to the extraction jets 76. The at least one interim nozzle 78 is in communication with at least one fluid line for supplying both an interim cleaning solution and an extraction cleaning solution, and wherein interim cleaning solutions are purged or cleansed from the supply line and the interim nozzle 78 by the subsequent provision of at least one extraction cleaning solution. As shown in FIG. 5C, the cleaning assembly 43 further comprises height-adjustable wheels 80 for manipulating a position of the cleaning assembly 43 and/or brush 70 relative to a ground or floor surface. The device further comprises a float shut-off feature 82. The float shut-off feature comprises a float ball, and operates to automatically shut off a vacuum function when a recovery tank reaches a predetermined fill level.

FIG. 6A is a side elevation view of a floor cleaning device 42 according to one embodiment of the present disclosure. As shown in FIG. 6A, the device 42 comprises a steering column 48 for manipulating, controlling, and steering the device 42. In the embodiment of FIG. 6A, the steering column 48 comprises an articulating and telescoping steering column. The steering column 48 may articulate as shown and described herein to facilitate storage of the device as well as provide adjustability to enhance user comfort and ergonomics. The steering column 48 comprises a primary member 90 that generally comprises a fixed trunk or base member, and at least a portion of which extends into the chassis 44 of the device to control the cleaning assembly 43 (for example). The primary member 90 is preferably provided in force-transmitting communication with the cleaning assembly to steer the cleaning assembly 43 and the device 42. The primary member 90 and the cleaning assembly 43 are preferably provided in communication by one or more known steering connection mechanisms including, but not limited to, a rack-and-pinion connection, a worm and sector connection, a recirculating ball mechanism, and other mechanisms and connections as will be recognized by one of ordinary skill in the art. In certain embodiments, the primary member 90 comprises a substantially fixed member, and wherein features that extend from the primary member 90 provide articulating and telescoping functions. Specifically, and as shown in FIG. 6A, the steering column 48 comprises a secondary member 94 that is rotatable at least with respect to the primary member 90 about a joint 92. The joint preferably comprises a release mechanism 93 (FIG. 6B) that allows for selective locking and release of the joint 92 and thereby selectively enables rotation of the secondary member 94 with respect to the primary member 90. FIG. 6A shows the steering column 48 being rotatable between a storage position and a position of use. It will be recognized, however, that the steering column 48 is rotatable between more than two positions. For example, the steering column 48 may be provided in and fixed in various positions of use based on user preference (for example). The release mechanism 93 is provided for securing a position of the steering column 48. In various embodiments, the joint 92 and release mechanism 93 comprise a plurality of mating teeth that can be compressed to be secured together, and wherein the plurality of teeth provide a plurality of locking positions. It will be recognized, however, that various different adjustment and joint mechanisms may be provided within the joint 92.

FIG. 6B is a side elevation view of the device 42 according to the embodiment of FIG. 6A. As shown in FIG. 6B, the steering column 48 comprises a telescoping member as well as an articulating member. Specifically, and as shown in FIG. 6B, the steering column 48 comprises a secondary member 94 with a sleeve 96, and wherein the sleeve 96 is translatable with respect to at least the secondary member 94. The sleeve 96 comprises a locking member 98 to secure a relative position of the secondary member 94 and the primary member 90. The locking member 98 preferably comprises sufficient locking strength such that the secondary member 94 and the primary member 90 co-rotate about a common axis when the steering wheel 100 is manipulated. Locking members 98 of the present disclosure include, but are not limited to, set screws, pins, spring-loaded ball members, and other features as will be recognized by one of ordinary skill in the art.

In various embodiments, at least one electrical connection is provided between the steering wheel 100 and the cleaning assembly 43. The at least one electrical connection preferably extends through the steering column, including the secondary member 94 and the primary member 90. Accordingly, the primary and secondary members 90, 94 preferably comprise hollow members to receive or accommodate wiring (for example). Additionally, in embodiments where wiring is provided in the steering column 48, the wiring preferably comprises sufficient slack to enable the telescoping adjustability shown in FIG. 6B.

FIG. 7 is a perspective view of a cleaning assembly 43 according to one embodiment of the present disclosure. As shown, the cleaning assembly 43 comprises at least one roller brush 70 and a trailing vacuum shoe 74. In normal operation, the assembly 43 comprises a device wherein a vacuum hose 102 is connected to a vacuum hose connection 104. A vacuum motor provides a vacuum force and liquids and solids are collected through the vacuum shoe 74 and collected by an on-board tank or reservoir via the vacuum hose 102. The cleaning assembly 43 further comprises the ability to provide vacuum force for a hand tool or cleaning accessory. For example, when difficult to reach areas are to be cleaned and/or wherein the cleaning accessory 43 is not appropriate for reaching or cleaning certain areas, the device may be converted such that is operable for use with a cleaning tool. A hand tool connection 108 is connectable to the vacuum shoe as shown. The primary vacuum hose 102 may be disconnected from the vacuum hose connection 104, and the hand tool connection 108 may be connected such that the hand tool or accessory is supplied with vacuum force from the cleaning assembly 43. The cleaning assembly 43 preferably comprises a rotatable device. In preferred embodiments, a rotation of the cleaning assembly 43 about a vertical axis and of about 180 degrees relative to the position shown in FIG. 5A, provides access to the hand tool connection 108 and enables the conversion shown and described herein. The cleaning assembly 43 comprises a quick-disconnect feature 106 wherein a fluid supply line for at least one on-board solution may be easily disconnected from the cleaning assembly 43. The quick-disconnect feature 106 provides a user the ability to disconnect or replace supply lines for at least one fluid, and also provides for enhanced mobility and flexibility of the device, particularly when the cleaning assembly 43 is to be arranged or configured in a position for using a hand tool or accessory.

While various embodiments of the system have been described in detail, it is apparent that modifications and alterations of those embodiments will occur to those skilled in the art. It is to be expressly understood that such modifications and alterations are within the scope and spirit of the present disclosure. Further, it is to be understood that the phraseology and terminology used herein is for the purposes of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein are meant to encompass the items listed thereafter and equivalents thereof, as well as, additional items. 

1. A method of operating a floor treatment apparatus, the method comprising: providing a floor treatment apparatus comprising: a fluid delivery system; a solution storage tank; and a fluid delivery path; wherein the fluid delivery path comprises a common delivery line for chemicals and solutions provided in the solution storage tank; a bifurcation in the fluid delivery path; a first ejection nozzle operable to dispense a cleaning solution; a second ejection nozzle operable to dispense a cleaning solution; a pump operable to convey fluid from the solution storage tank through the fluid delivery path; and a valve provided on an opposing side of the bifurcation relative to the storage tank, and wherein the valve is operable to control fluid flow; providing the valve in a closed position and directing a first fluid from the solution storage tank through the shared length of the fluid delivery path and through the first ejection nozzle until substantially all of the first solution is emptied from the solution storage tank, and wherein the first fluid comprises a cleaning solution; terminating a flow of the first fluid; supplying a second fluid to the solution storage tank; providing the valve in an open position; activating a flow of the second fluid from the solution storage tank, wherein the second fluid comprises a solvent, and purging the first fluid from the shared length and the first ejection nozzle by directing the second fluid through the shared length of the fluid delivery path, the first ejection nozzle, and the second ejection nozzle and wherein the second fluid is further used as a cleaning or working fluid.
 2. The method of claim 1, further comprising the step of manually manipulating a control member to selectively direct at least one of the first fluid and the second fluid.
 3. The method of claim 1, further comprising the step of activating a vacuum provided on the apparatus to collect at least one of the first fluid and the second fluid that has been dispensed from the apparatus.
 4. The method of claim 1, wherein a flow of the second fluid is automatically terminated after a predetermined amount of time.
 5. The method of claim 1, further comprising the step of allowing a predetermined amount of time to elapse after dispensing the first solution and prior to a dispensation of the second solution.
 6. The method of claim 1, wherein the apparatus comprises a user-interface and wherein dispensation of at least one of the first fluid and the second fluid is selectively controlled by operation of the user-interface.
 7. The method of claim 1, wherein the first fluid comprises an encapsulation carpet cleaner.
 8. The method of claim 7, wherein the second fluid comprises a solvent that is operable to clean a floor surface and remove the encapsulation carpet cleaner from the apparatus.
 9. A method of operating a floor treatment apparatus, the method comprising: providing a floor treatment apparatus comprising a cleaning assembly provided on a lower portion of the apparatus, and a fluid delivery system comprising a solution storage tank and a fluid delivery path; a first ejection nozzle operable to dispense a first cleaning solution; a second ejection nozzle operable to dispense a second cleaning solution; wherein the fluid delivery path comprises a first length comprising a shared length; a pump operable to convey fluid from the solution storage tank through the fluid delivery path; a valve operable to control fluid flow to the first ejection nozzle and the second ejection nozzle; providing the valve in a closed position and directing a first fluid from the solution storage tank through the shared length of the fluid delivery path and through the first ejection nozzle, and wherein the first fluid comprises a cleaning solution; allowing substantially all of the first solution to be emptied from the solution storage tank; supplying a second fluid to the solution tank; providing the valve in an open position and directing the second fluid from the solution storage tank through the shared length of the fluid delivery path and through the first ejection nozzle and the second ejection nozzle; and wherein the second fluid comprises a solvent that is operable to remove the first fluid from the fluid delivery path and the first ejection nozzle; wherein the second fluid comprises a flow rate that is suitable to purge or clean the first fluid from the fluid delivery path and the first ejection nozzle; and further using the second fluid as a working fluid in a floor cleaning operation.
 10. The method of claim 9, further comprising the step of manually manipulating a control member to selectively dispense at least one of the first fluid and the second fluid.
 11. The method of claim 9, further comprising the step of activating a vacuum provided on the apparatus to collect at least one of the first fluid and the second fluid after the fluid has been dispensed from the apparatus.
 12. The method of claim 9, wherein the pump automatically terminates a flow of the second fluid after a predetermined amount of time.
 13. The method of claim 9, further comprising the step of allowing a predetermined amount of time to elapse after dispensing the first solution and prior to a dispensation of the second solution.
 14. The method of claim 9, wherein the apparatus comprises a user-interface and wherein dispensation of at least one of the first fluid and the second fluid is selectively controlled by operation of the user-interface.
 15. A method of operating a floor treatment apparatus, the method comprising: providing a floor treatment apparatus having a cleaning assembly comprising: a chassis; a brush, a vacuum motor, and a pick-up orifice, and wherein at least a portion of the cleaning assembly is provided on a lower portion of the apparatus and is operable to clean a floor surface; a fluid delivery system comprising a solution storage tank and a fluid delivery path; a first ejection nozzle operable to dispense a first cleaning solution; a second ejection nozzle operable to dispense a second cleaning solution; wherein the fluid delivery path comprises a first length comprising a shared length; a pump operable to convey fluid from the solution storage tank through the fluid delivery path; a valve operable to control fluid flow to the first ejection nozzle and the second ejection nozzle; directing a first fluid from the solution storage tank through the shared length of the fluid delivery path, and wherein the first fluid comprises an encapsulation cleaning solution; refilling the solution storage tank with a second fluid after the first fluid has been exhausted; directing a second fluid from the second solution storage tank through the shared length of the fluid delivery path, and wherein the second fluid comprises a solvent; and wherein the second fluid is operable to remove the first fluid from the fluid delivery path, and wherein the second fluid is further operable to be used to clean a floor surface.
 16. The method of claim 15, further comprising the step of manipulating a control member to selectively dispense at least one of the first fluid and the second fluid.
 17. The method of claim 15, further comprising the step of activating the vacuum motor to collect at least one of the first fluid and the second fluid.
 18. (canceled)
 19. The method of claim 15, further comprising the step of allowing a predetermined amount of time to elapse after dispensing the first solution and prior to a dispensation of the second solution.
 20. The method of claim 15, wherein the apparatus comprises a user-interface and wherein dispensation of at least one of the first fluid and the second fluid is selectively controlled by operation of the user-interface. 